<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div{
				height: 100px;
				width: 100px;
				background-color: red;
				border-radius: 100%;
				display: flex;
				justify-content: center;
				align-items: center;
				color: white;
				font-size: 40px;
			}
		</style>
	</head>
	<body>
		<div>1</div>
	</body>
</html>
